Very nice work! Way to go getting all of this done during the jam. you've juiced the hell out of this thing and that helps a lot. Also, I think the little fungal aliens you made are adorable, and that's always a plus.
The one thing I was not a fan of was the input swapping. I know it was to fit the theme, but it just does not work for me. You've got this really fun, if simple, top down shooter and then it interrupts you periodically to ask you to relearn the controls. Often the moment of swapping lead me to take damage. To me that didn't seem like a necessary frustration. I think you could alleviate this by foreshadowing the coming change with an icon for each type of control swapping, but it may just be a bandage fix.
I would love to see you keep working on this. Your art style is great, and you've got a solid grasp of making games feel punchy, and satisfying, but I'd revisit control swapping thing and see if you can come up with something fun and thematically appropriate. I look forward to seeing what you make in the future!